A modular double-layer prefabricated substation

Abstract

This invention relates to the field of power equipment technology and discloses a modular double-layer prefabricated substation, including a transformer compartment in the upper layer and a high-voltage compartment and a low-voltage compartment in the lower layer. The transformer compartment is equipped with transformer modules with quick-release and quick-installation structures; the high-voltage compartment is equipped with high-voltage modules with quick-release and quick-installation structures; and the low-voltage compartment is equipped with low-voltage modules with quick-release and quick-installation structures. The quick-release and quick-installation structure includes a module base plate and a chassis vehicle. This invention significantly improves the convenience and flexibility of substation operation and maintenance, solving at least one of the problems of difficult maintenance, difficult expansion, and large footprint of prefabricated substations.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a modular double-layer box-type substation. Background Technology

[0002] A prefabricated substation (or simply prefabricated substation) is a complete set of power equipment integrating a transformer, high-voltage switchgear, and low-voltage distribution devices, widely used in urban power distribution networks. Prefabricated substations have advantages such as compact structure, convenient installation, and high protection levels. Based on different structural forms, they are mainly divided into European-style and American-style prefabricated substations.

[0003] Existing prefabricated substations have electrical components fixed inside a metal casing, making maintenance difficult. If internal components fail, on-site replacement is challenging, typically requiring complete disassembly and transport back to the factory for repair. This results in long maintenance cycles, high costs, and prolonged power outages for users. Furthermore, the fixed internal layout lacks flexibility, making rapid capacity expansion difficult and posing significant construction risks when on-site capacity increases or functional expansions are needed.

[0004] Furthermore, although existing prefabricated substations have achieved miniaturization compared to traditional substations, they still occupy a large area, limiting their deployment in urban areas where land resources are scarce. With the increasing demand for power distribution facilities driven by the development of new energy sources, the shortcomings of existing prefabricated substations in terms of maintainability, scalability, and space utilization are becoming increasingly apparent.

[0005] Therefore, there is an urgent need for a more compact prefabricated substation structure that is easy to maintain, supports on-site expansion, and is more compact, in order to meet the development needs of modern power distribution systems. Summary of the Invention

[0006] This invention provides a modular double-layer box-type substation to solve at least one of the problems associated with box-type substations, such as difficult maintenance, difficult expansion, and large footprint.

[0007] A modular double-layer box-type substation includes a transformer compartment in the upper layer and a high-voltage compartment and a low-voltage compartment in the lower layer.

[0008] The transformer compartment is equipped with a transformer module having a quick-release and quick-install structure;

[0009] The high-voltage compartment is equipped with a high-voltage module having the quick-release and quick-install structure;

[0010] The low-pressure compartment is equipped with a low-pressure module having the quick-release and quick-install structure;

[0011] The quick-release and quick-install structure includes a modular base plate and a chassis vehicle;

[0012] The module base plate is fixed on the compartment base plate; the module base plate includes a lead screw fixing block, a locking mechanism, a guide positioning structure, a base plate fixing connection structure, and at least two parallel guide rails;

[0013] The lead screw fixing block is used to cooperate with the lead screw installed on the chassis vehicle, so that when the lead screw rotates, it drives the chassis vehicle to move forward / backward.

[0014] The locking mechanism is used to lock the position of the chassis vehicle;

[0015] The guiding and positioning structure is used to dock with the transfer device; the transfer device is used to transfer the module to be removed; the module to be removed is the transformer module, the high-voltage module, or the low-voltage module.

[0016] The base plate fixing connection structure is used to fix the module base plate to the compartment base plate;

[0017] The guide rail is used to form a rolling contact pair with the roller assembly mounted on the chassis, and the guide rail is parallel to the lead screw;

[0018] The chassis vehicle includes a chassis vehicle body, the lead screw, the roller assembly, a chassis vehicle fixing structure, an electric drive unit, and an interactive component of the locking mechanism;

[0019] The chassis body is used to carry electrical components;

[0020] The chassis vehicle fixing structure is used to fix the chassis vehicle in the compartment where the quick-release and quick-install structure is located;

[0021] The electric drive unit is used to drive the lead screw to rotate, so that the chassis can move forward / backward.

[0022] The locking mechanism interaction component is used to control the locking state of the locking mechanism.

[0023] Optionally, the transformer compartment faces forward;

[0024] The high-pressure compartment faces the first side.

[0025] The low-pressure compartment faces the second side opposite to the first side.

[0026] Optionally, the high-voltage module and the transformer module, as well as the transformer module and the low-voltage module, are connected by conductive connectors; the conductive connectors include cables or copper busbars.

[0027] Optionally, the outward end of the lead screw is provided with a handle interface;

[0028] When the handle interface is connected to the movable handle, the chassis vehicle can be moved forward or backward by manually applying force to shake the movable handle.

[0029] Optionally, the conductive connector is installed inside a square pipe;

[0030] The square pipe is detachably installed in the compartment and is made of materials including metal and / or plastic;

[0031] The square pipe includes a transparent sealing plate.

[0032] Optionally, the double-layer box-type substation includes an outer enclosure door;

[0033] A heat dissipation hole is provided at the bottom of the outer casing door;

[0034] A heat dissipation component is provided above the outer enclosure door; the heat dissipation component is used to exhaust hot air from the double-layer box-type substation.

[0035] Optionally, the outer casing of the double-layer box-type substation is made of corrosion-resistant metal material, including stainless steel.

[0036] Optionally, the electric drive unit includes a motor, a gear set, a chassis power supply, a control circuit, and control buttons;

[0037] The input terminal of the motor is connected to the control circuit;

[0038] The control circuit receives start / stop and direction command signals from the control button and is controlled by the limit protection signal of the travel switch.

[0039] The output shaft of the electric motor meshes with the input stage of the gear set;

[0040] After undergoing multi-stage reduction, the output shaft of the gear set is directly or via a coupling connected to the lead screw.

[0041] The chassis power supply provides power to the control circuit and the motor.

[0042] Optionally, the locking mechanism includes an electromagnetic lock;

[0043] The locking mechanism interactive component is powered by the chassis vehicle power supply;

[0044] When the locking mechanism interactive component is energized, the electromagnetic lock is in a locked state; when the locking mechanism interactive component is de-energized, the electromagnetic lock is in an unlocked state.

[0045] Optionally, the double-layer box-type substation is equipped with a chassis vehicle power supply line;

[0046] The input terminal of the chassis vehicle power supply line is connected to the output terminal of the low-voltage module;

[0047] The output terminal of the chassis vehicle power supply line is connected to the chassis vehicle power supply in each compartment, and the chassis vehicle power supply is charged according to a preset charging strategy.

[0048] The double-layer prefabricated substation provided by this invention effectively improves space utilization through a three-dimensional layered layout, making it suitable for areas with limited land resources. Each functional module adopts a quick-disassembly and quick-assembly structure, combined with an electric chassis and a guiding and positioning system, significantly improving installation, replacement, and maintenance efficiency. Maintenance time is reduced from hours or even days to minutes, greatly enhancing power supply reliability and reducing power outage losses. The locking mechanism and guide rail rollers work together, reducing the risk of manually lifting heavy equipment while ensuring the stability and connection accuracy of electrical modules, thus enhancing power supply reliability. The modular design supports rapid capacity expansion or flexible functional adjustment; when the load increases, only the corresponding functional modules need to be added or replaced. This invention significantly improves the convenience and flexibility of substation operation and maintenance, solving the problems of difficult maintenance, capacity expansion, and large footprint of prefabricated substations. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a front view of a double-layer box-type substation according to an embodiment of the present invention;

[0051] Figure 2 This is a side view of a double-layer box-type substation facing the high-voltage compartment in one embodiment of the present invention;

[0052] Figure 3 This is a cross-sectional structural diagram of the chassis vehicle in one embodiment of the present invention;

[0053] Figure 4 This is a front view of the chassis vehicle in one embodiment of the present invention;

[0054] Figure 5 This is a top view of the module base plate in one embodiment of the present invention;

[0055] Figure 6 This is a front view of the module base plate in one embodiment of the present invention. Detailed Implementation

[0056] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0057] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] like Figures 1-6 As shown, a modular double-layer box-type substation includes a transformer compartment 01 located on the upper layer, and a high-voltage compartment 03 and a low-voltage compartment 05 located on the lower layer.

[0060] Transformer compartment 01 is equipped with transformer module 02, which has a quick-release and quick-install structure;

[0061] High-voltage compartment 03 is equipped with a high-voltage module 04 with a quick-release and quick-install structure;

[0062] Low-pressure compartment 05 is equipped with a low-pressure module 06 with a quick-release and quick-install structure;

[0063] The quick-release and quick-install structure includes the modular base plate 09 and the chassis vehicle 08;

[0064] The module base plate 09 is fixed on the compartment base plate; the module base plate 09 includes a lead screw fixing block 092, a locking mechanism, a guide positioning structure 095, a base plate fixing connection structure 094, and at least two parallel guide rails 091;

[0065] The lead screw fixing block 092 is used to cooperate with the lead screw 081 set on the chassis vehicle 08, so that when the lead screw 081 rotates, it drives the chassis vehicle 08 to move forward / backward.

[0066] The locking mechanism is used to lock the position of chassis vehicle 08;

[0067] The guide positioning structure 095 is used to dock with the transfer device; the transfer device is used to transfer the module to be removed; the module to be removed is transformer module 02, high voltage module 04, or low voltage module 06.

[0068] The base plate fixing connection structure 094 is used to fix the module base plate 09 to the compartment base plate;

[0069] Guide rail 091 is used to form a rolling contact pair with roller assembly 082 mounted on chassis 08, and guide rail 091 is parallel to lead screw 081;

[0070] Chassis vehicle 08 includes chassis vehicle body, lead screw 081, roller assembly 082, chassis vehicle fixing structure 083, electric drive unit and locking mechanism interaction component 084;

[0071] The chassis body is used to carry electrical components;

[0072] Chassis vehicle fixing structure 083 is used to fix chassis vehicle 08 in the compartment where quick-release and quick-install structure is located;

[0073] The electric drive unit is used to drive the lead screw 081 to rotate, so that the chassis 08 can move forward / backward.

[0074] The locking mechanism interactive component 084 is used to control the locking state of the locking mechanism.

[0075] Understandably, the modular double-layer box-type substation provided in this embodiment is characterized by its three-dimensional layered layout and all-round quick-disassembly and quick-assembly structure, which significantly improves the space utilization, power supply reliability and operation and maintenance efficiency of the equipment. It is particularly suitable for urban centers, new energy charging stations, and scenarios with scarce land resources or high requirements for power supply continuity.

[0076] The double-layer prefabricated substation adopts a transformer compartment 01 on the upper layer and a high-voltage compartment 03 and a low-voltage compartment 05 on the lower layer, forming an efficient three-dimensional functional zoning that greatly saves floor space. Transformer module 02 is located in transformer compartment 01, high-voltage module 04 is located in high-voltage compartment 03, and low-voltage module 06 is located in low-voltage compartment 05. All three electrical modules utilize a quick-release and quick-install structure, facilitating the replacement of older modules and improving power restoration efficiency.

[0077] The quick-release and quick-install structure includes the modular base plate 09 and the chassis vehicle 08. For example... Figure 5 , 6As shown, the module base plate 09 includes a lead screw fixing block 092, a locking mechanism, a guide positioning structure 095, a base plate fixing connection structure 094, and at least two parallel guide rails 091. The module base plate 09 serves as the base of the entire quick-release and quick-install structure and is fixed to the compartment base plate via the base plate fixing connection structure 094 (e.g., bolts or welding). The guide rails 091 on the module base plate 09 provide a smooth track for the chassis vehicle 08, forming a rolling contact pair with the roller assembly 082 on the chassis vehicle 08, and bearing the main weight of the electrical module. The lead screw fixing block 092, located in the middle of the module base plate 09, together with the lead screw 081 on the chassis vehicle 08 and the electric drive unit, forms a lead screw transmission system. The motor drives the lead screw 081 to rotate, converting it into linear motion of the chassis vehicle 08, achieving precise "forward / reverse" control. The locking mechanism is used to lock the chassis 08 to the module base plate 09 after the electrical module is in place, through a locking action (achieved by a pin, pawl, etc.), to prevent the electrical equipment from shifting due to vibration or external force during operation. The guide positioning structure 095 set on the module base plate 09 is used to dock with external transfer devices (such as hydraulic pallet trucks, small gantry cranes) to ensure accurate guidance of the electrical module during removal or installation.

[0078] like Figure 3 , 4 As shown, the chassis 08 includes a chassis body, a lead screw 081, a roller assembly 082, a chassis fixing structure 083, an electric drive unit, and a locking mechanism interaction component 084. The chassis body, as the core load-bearing structure, possesses sufficient rigidity and strength to support heavy electrical equipment such as transformers and prevent deformation. The chassis fixing structure 083 securely locks the chassis 08 to the transformer foundation after the electrical module is in place, resisting impacts such as short-circuit electromagnetic forces and ensuring operational safety. The electric drive unit, which can be a servo motor, stepper motor, or a conventional motor with a gearbox, drives the lead screw 081 to rotate, enabling the chassis 08 to move forward / backward. The locking mechanism interaction component 084 cooperates with the locking mechanism (such as a locking tongue) on the module base plate 09, receiving commands and executing "locking" or "unlocking" actions.

[0079] The double-layer prefabricated substation provided in this embodiment effectively improves space utilization through a three-dimensional layered layout, making it suitable for areas with limited land resources. Each functional module adopts a quick-release and quick-install structure, combined with the electric drive chassis 08 and a guiding and positioning system, significantly improving installation, replacement, and maintenance efficiency. Maintenance time is reduced from hours or even days to minutes, greatly enhancing power supply reliability and reducing power outage losses. The locking mechanism and guide rail 091 rollers work together, reducing the risk of manually lifting heavy equipment while ensuring the stability and connection accuracy of electrical modules, thus enhancing power supply reliability. The modular design supports rapid capacity expansion or flexible functional adjustment; when the load increases, only the corresponding functional modules need to be added or replaced. This embodiment significantly improves the convenience and flexibility of substation operation and maintenance, making it particularly suitable for applications with high requirements for power supply continuity.

[0080] In one application example, during the installation of the electrical module, a transfer device can be used to transport the chassis 08 carrying the electrical module to the corresponding compartment door of the transformer substation. Coarse positioning is performed using the guide positioning structure 095, then the rollers of the chassis 08 are aligned and placed into the guide rail 091. The electric drive unit is activated, and the lead screw 081 rotates, smoothly pushing the entire module into the compartment until it reaches the working position. The locking mechanism automatically or manually locks the module, and the electrical connectors are simultaneously mated during this process.

[0081] In another application example, the electrical connection can be disconnected when disassembling / replacing the module. The locking mechanism control unit unlocks the module. The electric drive unit is then activated to rotate in reverse, and the lead screw 081 smoothly moves the chassis 08 along with the electrical module out of the compartment until it is fully exposed on the guide rail 091. The transfer device then docks with the guide positioning structure 095, allowing the entire module to be removed for inspection or replacement.

[0082] Optionally, transformer compartment 01 faces forward;

[0083] High-pressure compartment 03 faces the first side;

[0084] The low-pressure compartment 05 faces the second side opposite to the first side.

[0085] Understandably, transformer compartment 01 faces the front, which serves as the main contact surface for daily operation and maintenance. The door of transformer compartment 01 faces the road in front, making it easy for large vehicles (such as cranes and transfer vehicles) to approach, and providing an open operating space for the installation, replacement or emergency handling of the transformer.

[0086] The high-voltage compartment 03 faces the first side. The first side is usually located away from areas with frequent personnel activity. This area can be marked with warning signs and fences to form a dedicated high-voltage operating area, restricting access to non-professionals.

[0087] The entrance to the low-voltage compartment 05 faces the second side, which is opposite to the first side. The second side is closer to the user load center (such as charging piles or buildings), which facilitates the lead-out and connection of a large number of low-voltage cables 072, and maintenance personnel can also carry out daily operations relatively safely here.

[0088] In this embodiment, transformer compartment 01 is located at the front, facilitating direct observation and operation of core equipment by maintenance personnel. High-voltage and low-voltage compartments 05 are positioned on opposite sides, achieving physical isolation between the high and low voltage areas and effectively improving electrical safety and electromagnetic compatibility. The three-sided independent door design avoids cross-interference during maintenance, supports parallel operations, and improves maintenance efficiency. Simultaneously, this layout optimizes internal wiring paths, reduces cable crossings and losses, and enhances the overall reliability and maintainability of the transformer substation. Furthermore, it makes the substation structure more compact, reducing its footprint.

[0089] Optionally, the high-voltage module 04 and the transformer module 02, as well as the transformer module 02 and the low-voltage module 06, are connected by conductive connectors; the conductive connectors include cables 072 or copper busbars 071.

[0090] Understandably, the electrical connections between the high-voltage module 04 and the transformer module 02, and between the transformer module 02 and the low-voltage module 06, can be achieved using conductive connectors, which can be cables 072 or copper busbars 071.

[0091] In one example, high-voltage module 04 and transformer module 02 are connected by high-voltage cable 072. This connection method is flexible and facilitates independent installation and maintenance of the modules. Transformer module 02 and low-voltage module 06 are connected by copper busbar 071. Copper busbar 071 has advantages such as large current carrying capacity, low resistance, low loss, high mechanical strength, and stable connection, making it very suitable for high-current, short-distance transmission.

[0092] This embodiment achieves a reliable electrical connection between the high-voltage module 04, the transformer module 02, and the low-voltage module 06 through conductive connectors such as cable 072 or copper busbar 071, ensuring efficient power transmission. The copper busbar 071 has advantages such as high current carrying capacity, low temperature rise, and stable connection, making it suitable for large-capacity substations; while cable 072 provides flexible wiring and vibration damping capabilities, adapting to different installation environments.

[0093] Optionally, such as Figure 4 As shown, the lead screw 081 has a handle interface 0810 at one of its outward ends;

[0094] When the handle interface 0810 is connected to the movable handle 085, the chassis vehicle 08 can be moved forward / backward by manually applying force to shake the movable handle 085.

[0095] Understandably, a handle interface 0810 is provided at the outward end of the lead screw 081 on the chassis 08, ensuring that maintenance personnel can still reliably move the heavy electrical module manually in the event of electric drive system failure or when fine control is required. The handle interface 0810 can be a standardized metal component with internal slots or protrusions, securely mounted on the outward-extending shaft end of the lead screw 081. The movable handle 085 is a detachable lever arm with a matching drive head (such as a square one) at one end. When the movable handle 085 is inserted into the interface, manually cranking the handle drives the lead screw 081 to rotate. Since the lead screw 081 forms a threaded engagement with the nut fixed on the chassis 08 (or the lead screw fixing block 092 on the module base plate 09), the rotational motion of the lead screw 081 is converted into linear motion of the chassis 08 along the guide rail 091. Cranking the handle clockwise or counterclockwise controls the chassis 08 to move forward or backward.

[0096] This embodiment adds a handle interface 0810 to the outer end of the lead screw 081, enabling manual operation via a movable handle 085 in case of electric drive unit failure or power outage, ensuring the emergency access capability of the electrical module. The dual-mode manual and electric drive enhances system redundancy and reliability, adapting to complex maintenance environments. This embodiment is easy to operate, requires no additional tools, reduces reliance on specialized equipment, and improves on-site maintenance flexibility.

[0097] Optionally, the conductive connector is installed inside the square pipe;

[0098] Square pipes can be detachably installed in the compartment and are made of materials including metal and / or plastic;

[0099] The square pipe includes a transparent cover.

[0100] Understandably, square conduits can be used to protect and encapsulate conductive connections. Specifically, the square conduits can be detachably mounted on the compartment floor or frame using brackets and connectors. The conduit body can be made of galvanized steel or high-strength flame-retardant engineering plastics, or a composite structure of a metal frame and plastic panel to balance strength and insulation. A quick-opening transparent cover, made of a high-strength, impact-resistant transparent material such as polycarbonate (PC), is installed on the side of the conduit facing the maintenance personnel.

[0101] This embodiment integrates conductive connectors into a detachable square conduit, effectively improving wiring neatness and electrical safety, while facilitating overall installation and subsequent maintenance. The square conduit is made of metal or plastic, taking into account electromagnetic shielding and insulation requirements, and adapting to different electrical environments. The transparent cover design allows maintenance personnel to intuitively observe the internal connection status, enabling preliminary inspections without disassembly, thus improving maintenance efficiency. The detachable structure further supports modular replacement and rapid fault handling, enhancing system flexibility and reliability.

[0102] Optionally, the double-layer prefabricated substation includes an outer enclosure door;

[0103] Ventilation holes are provided at the bottom of the outer door;

[0104] A heat dissipation component is installed above the outer enclosure door; the heat dissipation component is used to exhaust hot air from inside the double-layer prefabricated substation.

[0105] Understandably, the operation of electrical equipment (especially transformers) inside a prefabricated substation generates a significant amount of heat, heating the air inside the enclosure. Hot air, being less dense, naturally rises and accumulates at the top of the enclosure. At this point, active cooling components (such as exhaust fans) located above the outer door activate, continuously drawing the accumulated hot air out of the enclosure. This suction process creates a slight negative pressure inside the enclosure, acting like an invisible straw that guides cooler, denser air from outside the enclosure into the ventilation holes located below the outer door, providing cooling air for the electrical equipment. This incoming cool air flows upwards within the enclosure, continuously absorbing the heat generated by the equipment, forming a continuous and stable bottom-up cooling airflow circulation.

[0106] This embodiment utilizes ventilation holes at the bottom of the outer enclosure door and active or passive cooling components at the top to create a bottom-up natural convection or forced airflow, effectively improving heat dissipation efficiency within the enclosure. Cool air enters through the bottom ventilation holes, while hot air is exhausted through the top cooling components, optimizing the internal temperature control environment and ensuring long-term stable operation of electrical equipment. The integrated cooling structure in the outer enclosure door eliminates the need for additional space on the side of the enclosure, balancing a clean appearance with functional integration. The cooling structure provided in this embodiment is particularly suitable for substations with high-density layouts or in high-temperature environments, significantly improving heat dissipation performance and operational reliability.

[0107] Optionally, the outer casing of the double-layer prefabricated substation is made of corrosion-resistant metal material, including stainless steel.

[0108] Understandably, the outer casing of a double-layer prefabricated substation can be made of corrosion-resistant metal materials. These materials can be stainless steel. Corrosion-resistant metal materials offer exceptional reliability, extended service life, and economic efficiency throughout their entire lifecycle, even in harsh environments.

[0109] This embodiment uses stainless steel and other corrosion-resistant metal materials to manufacture the outer shell, which significantly improves the durability and service life of the double-layer box-type substation in harsh environments such as humidity, salt spray, and industrial pollution; the corrosion resistance effectively prevents the shell from rusting and aging, ensures the equipment's sealing and structural integrity, and reduces maintenance frequency and total life cycle cost.

[0110] Optionally, such as Figure 3 and Figure 4 As shown, the electric drive unit includes a motor 086, a gear set 087, a chassis power supply 088, a control circuit, and control buttons 089.

[0111] The input terminal of motor 086 is connected to the control circuit;

[0112] The control circuit receives start / stop and direction command signals from control button 089 and is controlled by limit protection signals from limit switches;

[0113] The output shaft of motor 086 meshes with the input stage of gear set 087;

[0114] After multi-stage reduction, the output shaft of gear set 087 is directly or through a coupling to lead screw 081;

[0115] The chassis power supply 088 supplies power to the control circuit and the motor 086.

[0116] Understandably, the electric drive unit includes a motor 086, a gear set 087, a chassis power supply 088, a control circuit, and a control button 089. This electric drive unit is used to receive simple commands from the user (such as pressing the "forward" button), then drive the motor 086, and then transmit the power to the lead screw 081 through a gear set 087, ultimately converting it into smooth and precise linear motion of the chassis 08.

[0117] The electric motor 086 is an actuator that converts electrical energy into mechanical rotational power. It is typically an AC or DC motor capable of reversible rotation. Here, the electric motor 086 can be a permanent magnet synchronous motor, which has the advantages of high efficiency and high power density. The gear set 087 is the core reduction and torque amplification device. The high-speed, low-torque output of the electric motor 086 is converted into the low-speed, high-torque required to drive the lead screw 081 through multi-stage transmission of the gear set 087. Here, the gear set 087 can employ multi-stage gear transmission, resulting in a large transmission ratio and compact structure. After multi-stage reduction, the output shaft of the gear set 087 is directly connected to the lead screw 081 or via a coupling. Here, the coupling is the component connecting the output shaft of the gear set 087 and the lead screw 081, used to compensate for minor alignment errors.

[0118] The chassis power supply 088 supplies power to the control circuit and the motor 086. The chassis power supply 088 can be a battery pack. Control button 089 is used for starting, stopping, and direction selection. The limit switch is triggered when the chassis 086 moves to its extreme position, cutting off the circuit and providing hard limit protection. The control circuit receives commands from control button 089 and, combined with the signals from the limit switch, determines the action of motor 086. The control circuit is crucial for achieving automated control and safety protection.

[0119] The electric drive unit provided in this embodiment achieves smooth and precise linear drive of the chassis vehicle 08 through the linkage of the electric motor 086, the multi-stage reduction gear set 087, and the lead screw 081, balancing output torque and motion control accuracy. The control circuit integrates start / stop, direction command, and limit switch protection to ensure safe and reliable module entry and exit, avoiding overshoot or mechanical collisions. The chassis vehicle power supply 088 provides independent power, ensuring the autonomous operation of the drive and control system, suitable for emergency maintenance scenarios without external power. The electric drive unit provided in this embodiment has a compact overall structure and a high degree of automation, significantly improving module loading and unloading efficiency and operational safety.

[0120] Optionally, the locking mechanism includes an electromagnetic lock 093;

[0121] The locking mechanism interactive component 084 is powered by the chassis vehicle power supply 088;

[0122] When the locking mechanism interactive component 084 is energized, the electromagnetic lock 093 is in the locked state; when the locking mechanism interactive component 084 is de-energized, the electromagnetic lock 093 is in the unlocked state.

[0123] Understandably, the locking mechanism can employ an electromagnetic lock 093. The electromagnetic lock 093 is a terminal that performs locking and unlocking actions, consisting of a coil, an iron core, a latch, and a return spring. Here, the electromagnetic lock 093 employs a fail-safe design; that is, in the event of an unexpected power outage (such as a malfunction or emergency shutdown), the electromagnetic lock 093 will automatically release, ensuring the module can be urgently removed, protecting equipment and personnel, and meeting safety standards. The latch is made of high-strength steel to ensure it can withstand significant impacts such as short-circuit electrodynamic forces, guaranteeing a stable connection point. The interoperable component 084 of the locking mechanism includes the electromagnetic lock coil and the electromagnetic lock hole.

[0124] Once the transformer module 02, high-voltage module 04, or low-voltage module 06 is precisely delivered into its designated working position within the transformer compartment by the chassis vehicle 08, the chassis vehicle power supply 088 continuously supplies power to the locking mechanism's interactive component 084. The energized electromagnetic lock 093 generates a strong magnetic force, causing its locking tongue (or locking pin) to extend and securely engage with the dedicated lock hole on the chassis vehicle 08 or the module base plate 09, mechanically locking the chassis vehicle 08 in its current position and ensuring that the electrical equipment does not move accidentally during operation.

[0125] When maintenance or module replacement is required, the control system first cuts off the power to the locking mechanism's interactive component 084. With the current gone, the electromagnet's magnetic force also disappears. At this point, the return spring inside the electromagnetic lock 093 activates, pushing the bolt back and releasing the mechanical lock. Once a confirmation signal of successful unlocking is received, the chassis vehicle 08's electric drive unit starts, smoothly moving the electrical module out.

[0126] The locking mechanism provided in this embodiment adopts an electromagnetic lock 093 design, powered by the chassis vehicle power supply 088 to achieve energized locking and de-energized unlocking. The control logic is simple, reliable, and responsive. Under normal operating conditions, the electromagnetic lock 093 remains energized and locked, ensuring the module is securely positioned and preventing displacement due to vibration or external forces, thus improving operational safety. It automatically unlocks upon power failure, facilitating manual removal of the module in emergencies or power outages, enhancing system fault tolerance and emergency handling capabilities. The overall structure of this embodiment requires no mechanical key or complex operation, supports remote or automated control, and improves the level of intelligent operation and maintenance.

[0127] Optionally, the double-layer box-type substation is equipped with a chassis vehicle power supply line 088;

[0128] The input terminal of the chassis vehicle power supply 088 power supply line is connected to the output terminal of the low-voltage module 06;

[0129] The output terminal of the chassis vehicle power supply 088 power supply line is connected to the chassis vehicle power supply 088 in each compartment, and the chassis vehicle power supply 088 is charged according to the preset charging strategy.

[0130] Understandably, each compartment in the double-layer prefabricated substation is equipped with a chassis power supply 088 power line. The chassis power supply 088 power line draws power from the output of the low-voltage module 06 and can supply power to the chassis power supply 088 in each compartment according to a preset charging strategy. The preset charging strategy can be set according to actual needs, such as off-peak charging: charging during off-peak hours when electricity prices are low to save on electricity costs; intelligent float charging: automatically switching to low-current float charging after the battery is fully charged to compensate for self-discharge and avoid overcharging that could damage battery life; and periodic maintenance: automatically performing charge-discharge cycles on the battery periodically to maintain battery activity.

[0131] This embodiment connects the chassis vehicle power supply 088 power supply line to the output terminal of the low-voltage module 06, enabling local power extraction within the substation. This eliminates the need for an external power source to charge the chassis vehicle power supplies 088 in each compartment, enhancing system self-sufficiency and providing extremely high operational reliability. It ensures that under any circumstances, as long as the main system has power, the chassis vehicle 08 will be fully charged, preventing maintenance interruptions due to power issues. The preset charging strategy intelligently manages charging timing and power, reducing operating costs. Furthermore, through refined battery management, it extends the lifespan of the chassis vehicle power supply 088.

[0132] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A modular double-layer prefabricated substation, characterized in that, This includes the transformer compartment located on the upper level, and the high-voltage compartment and low-voltage compartment located on the lower level; The transformer compartment is equipped with a transformer module having a quick-release and quick-install structure; The high-voltage compartment is equipped with a high-voltage module having the quick-release and quick-install structure; The low-pressure compartment is equipped with a low-pressure module having the quick-release and quick-install structure; The quick-release and quick-install structure includes a modular base plate and a chassis vehicle; The module base plate is fixed on the compartment base plate; the module base plate includes a lead screw fixing block, a locking mechanism, a guide positioning structure, a base plate fixing connection structure, and at least two parallel guide rails; The lead screw fixing block is used to cooperate with the lead screw installed on the chassis vehicle, so that when the lead screw rotates, it drives the chassis vehicle to move forward / backward. The locking mechanism is used to lock the position of the chassis vehicle; The guiding and positioning structure is used to dock with the transfer device; the transfer device is used to transfer the module to be removed; the module to be removed is the transformer module, the high-voltage module, or the low-voltage module. The base plate fixing connection structure is used to fix the module base plate to the compartment base plate; The guide rail is used to form a rolling contact pair with the roller assembly mounted on the chassis, and the guide rail is parallel to the lead screw; The chassis vehicle includes a chassis vehicle body, the lead screw, the roller assembly, a chassis vehicle fixing structure, an electric drive unit, and an interactive component of the locking mechanism; The chassis body is used to carry electrical components; The chassis vehicle fixing structure is used to fix the chassis vehicle in the compartment where the quick-release and quick-install structure is located; The electric drive unit is used to drive the lead screw to rotate, so that the chassis can move forward / backward. The locking mechanism interaction component is used to control the locking state of the locking mechanism; The electric drive unit includes a motor, a gear set, a chassis power supply, a control circuit, and control buttons; The input terminal of the motor is connected to the control circuit; The control circuit receives start / stop and direction command signals from the control button and is controlled by the limit protection signal of the travel switch. The output shaft of the electric motor meshes with the input stage of the gear set; After undergoing multi-stage reduction, the output shaft of the gear set is directly or via a coupling connected to the lead screw. The chassis power supply provides power to the control circuit and the motor; The locking mechanism includes an electromagnetic lock; The locking mechanism interactive component is powered by the chassis vehicle power supply; the locking mechanism interactive component includes an electromagnetic lock coil and an electromagnetic lock hole; the locking mechanism interactive component cooperates with the locking mechanism on the module base plate, receives instructions and performs locking or unlocking actions; the locking mechanism includes a lock tongue; When the locking mechanism interactive component is energized, the electromagnetic lock is in a locked state; when the locking mechanism interactive component is de-energized, the electromagnetic lock is in an unlocked state.

2. The modular double-layer prefabricated substation according to claim 1, characterized in that, The transformer compartment faces forward; The high-pressure compartment faces the first side. The low-pressure compartment faces the second side opposite to the first side.

3. The modular double-layer prefabricated substation according to claim 1, characterized in that, The high-voltage module and the transformer module, as well as the transformer module and the low-voltage module, are connected by conductive connectors; the conductive connectors include cables or copper busbars.

4. The modular double-layer prefabricated substation according to claim 3, characterized in that, The lead screw is provided with a handle interface at one of its outward-facing ends; When the handle interface is connected to the movable handle, the chassis vehicle can be moved forward or backward by manually applying force to shake the movable handle.

5. The modular double-layer prefabricated substation according to claim 3, characterized in that, The conductive connector is installed inside the square pipe; The square pipe is detachably installed in the compartment and is made of materials including metal and / or plastic; The square pipe includes a transparent sealing plate.

6. The modular double-layer prefabricated substation according to claim 1, characterized in that, The double-layer box-type substation includes an outer enclosure door; A heat dissipation hole is provided at the bottom of the outer casing door; A heat dissipation component is provided above the outer enclosure door; the heat dissipation component is used to exhaust hot air from the double-layer box-type substation.

7. The modular double-layer prefabricated substation according to claim 1, characterized in that, The outer shell of the double-layer box-type substation is made of corrosion-resistant metal material, including stainless steel.

8. The modular double-layer prefabricated substation according to claim 1, characterized in that, The double-layer box-type substation is equipped with a chassis vehicle power supply line. The input terminal of the chassis vehicle power supply line is connected to the output terminal of the low-voltage module; The output terminal of the chassis vehicle power supply line is connected to the chassis vehicle power supply in each compartment, and the chassis vehicle power supply is charged according to a preset charging strategy.

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